Micrometer gauge



J. A. SGHLEICHER.

MICROMETER GAUGE.

APPLICATION HLED nov.21, 1921.

1A2%,383, PatentedAug. 1 1922.

. ammuto z c/z/m Age/mam eral "scale for a citizen of the United iUMfTn s r, JOHN a scnnnronnn, or seernaw, uronman, Assienon TO THE turirrrriannn COMPANY, on sasrnaw; MICHIGAN, a connotation or trrorrrean.

MICROMETER sands.

7 0 all whom it may concern:

Be it known that I, JoHN lLJSCLHLEICIiElQ States of America, residing at Saginaw. in the county of Saginaw and State of htlichigan have invented certain new and useful Improvements in Micrometer Gauges, of which the following is 'a specification, reference being had therein to the accompanying drawings.

The invention relates to micrometer anges and has for its main object the provision of a micrometer gauge having' a sleeve surrounding the barrel and provided with a periphcooperating with the longitudinal scale upon the barrel, this sleeve being normally rotatable with the thimble to longitudinally adjust the spindle but being adapted to be rotated relative to the thimble whereby the zero marks upon the scales of the barrel and sleeve can be made to register at the time the spindle and anvil are in contact with each other. Other objects of the invention reside in the novel combinations and arrangements of parts as more fully hereinafter set forth.

In the drawings:

Figure 1 is a. side elevation of a micrometer gauge embodying my invention;

Figure 2 is an enlarged sectional side elevation thereof;

Figure 8 is an end View of the outer end of the sleeve;

Figure 4 is a side elevation of the sleeve.

In the present instance the micrometer gauge is a micrometer caliper although it is evident that other forms of instruments em bodying my invention may be used.

1 is the U-shaped frame of the micrometer caliper, 2 the anvil and 3 the longitudinally adjustable spindle journalled in the frame 1 and extending longitudinally through the tween the anvil and spindle, the barrel 4 is provided with the longitudinally extending scale 7 and there is the sleeve 8 normally rotatable with the thimble 6 and provided with the peripheral scale 9 upon its beveled edge Specification of letters Patent.

"Patented. Aug. 1, 1922.

Application filedNovember 21, 1921. Serial 1%. 516,571. j

cooperating:with"the longitudinal scale 7, bothet these scalesbeing provldedwlth a zero mark. i

In order to'talre up for wear on the end of the apvil, or on the spindle and nut of the micrometer caliper without adjusting the the thimhle 6 with the same pitch of thread as the threaded spindle 3 with the threaded anvil. the sleeve 8 threadedly engaged to nut 5. The sleeve 8 may be rotatably adjusted relative to the longitudinal scale and zero mark on the barrel 4- by holding the tlnmble 6 stationary, which is securely tas tened to the spindle 3;to bringthezero marks of the scales into registration at the time the spindle 3 and anvil 2 are in contact.

In order to maintain registration of the scales, the threaded end of the sleeve 8 is split to form a tongue 10, which tends to resiliently move outwardly beyond the circumference of the sleeve as shown in Figure 3 and thereby exerts frictional resistance which is greater than that offered to the rotation of the spindle in the nut 5.

What I claim as my invention is:

i. In a micrometer gauge, the combination with a frame and a barrel secured thereto, of a spindle extending through said barrel and threadedly engaged to the same, a thimble secured to said spindle and rotatable to longitudinally adjust the same in said barrel and frame, and a sleeve threadedly engaged to said thimble to be normally rotatable therewith but adapted to be rotatably adjusted relative thereto, said sleeve being threadedly engagedto said thimble with the same pitch of thread as the threaded spindle with the barrel.

2. in a micrometer gauge the combination with a frame and a barrel secured thereto, of a spindle extending through said barrel and threadedly engaged to the same, a thimble secured to said spindle and rotatable t0 longitudinally adjust the same in said barrel and frame and a sleeve threadedly' engaged to. said thimble to be normally rotataloletherewith but adapted to be rotatably adjusted relative thereto said sleeve being threadedly engaged to said thimble with the same pitch of thread as the threadedspindle with the barrel, and means upon said sleeve for exerting frictional resistance to maintain adjusted registration.

8. In a micrometer gauge, the combination with a frame and an anvil and barrel theretending throughsaid barrel,

ing rotatably connected tosaidbarrel, a

thimble securedto said to longitudinally by said sleeve is position.

rel, a thimble secured surrounding said barrel and provided with a peripheral scale for cooperating With said longitudinal scale upon sa'idbarrel, each of of a spindle journalled therein and ex said spindle'beadjust said spindle toward and away'from surrounding said barrel and cooperating therewith to indicate the distance between said anvil and spindle, said sleeve being threadedly engaged ing at itsvthreadedend a resilient tongue adapted to" normally occupy a position-be yond the circumference of said sleeve herenornially held in itsadjusted '4. In a micrometer gauge,

longitudinally said frame andextendingthrough said barto said spindle, a sleeve spindle and rotatable said anvil and a sleeve to said thimble and havthe combination with a frame and an anviland barrel thereon, said barrel having a extending scale, of a spindle journal-ledin and rotatable to longitudinally adjust the said barrel, and asleeve threadedly same 1n engaged to saidthimble to be normally rotatable therewith but adapted to be rotatablyadjusted relative thereto, said sleeve being threade'dly engaged to said thimble with the same pitch of thread as the v ith the nut. l j

In testimony whereof I aiiix my signature.

JOHN A. SCHLEICHERA I threaded spindle the combination 7 barrel secured thereto, of r 

